Malicious PDF — malware analysis report

Static analysis result for SHA-256 236f8f4876ee3878…

MALICIOUS

PDF

44.3 KB Authoring application: Pdftk
MD5: f87ca7141c7c47361811f7e7926511c0 SHA-1: 66e1fb550e52cce64477e82e9af7781f59195156 SHA-256: 236f8f4876ee38785b04c9deaef741fc6e83c48f6477fd6b5738cb97019174ec
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution mechanism for further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. The document body contains garbled text, indicating it is not intended for direct user consumption but rather as a container for the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.jaiciforqueen.com/uploads/1/3/0/6/130639296/9c706863732aa.pdf
    • http://therachelsue.com/uploads/1/3/0/5/130589064/2676842.pdf
    • http://earthcaravanfund.com/uploads/1/3/0/2/130289493/b900b8b5.pdf
    • http://pharrfamilychiropractic.com/uploads/1/3/0/5/130539295/betepegufojomofize.pdf
    • http://theeraofsuggestion.net/uploads/1/3/0/5/130590215/2544422.pdf
    • http://mta-sts.earlygirlfarm.com/uploads/1/3/0/4/130490668/32275.pdf
    • http://advgs.com.my/uploads/1/3/0/5/130589044/7871866.pdf
    • http://nicholslawpdx.com/uploads/1/3/0/5/130590578/padetedumif_nedojiken_vijazegis_donulifusa.pdf
    • http://leftbankwritersdenver.com/uploads/1/3/0/7/130739817/29899965d.pdf
    • http://writteninstone.gallery/uploads/1/3/0/7/130776123/rakotaf_rorutumegogib.pdf
    • http://funfun4kids.com/uploads/1/3/0/7/130775403/1cabbc7e.pdf
    • http://michaelkeithwelch.com/uploads/1/3/0/2/130289305/6674194.pdf
    • http://naturetherapycic.com/uploads/1/3/0/2/130289571/tekijeketaxixuso.pdf
    • http://acresofparadise.com/uploads/1/3/0/7/130776233/8752884.pdf
    • http://kenmcdonald.net/uploads/1/3/0/5/130541688/jamajeneze_lapujixepil_kofomitiz.pdf
    • http://atinamedicaltourism.com/uploads/1/3/0/7/130775268/woreridet.pdf
    • http://motorcycl-ng.com/uploads/1/3/0/6/130605030/5882268.pdf
    • http://referenceobscura.com/uploads/1/3/0/6/130604841/8272491.pdf
    • http://www.lethuyquetoi.com/uploads/1/3/0/2/130272267/tomululel_masorazoduvaf.pdf
    • http://mail.nfcareers.com/uploads/1/3/0/3/130324005/2883977.pdf
    • http://nailsbyrose.nl/uploads/1/3/0/6/130604554/4540626.pdf
    • http://www.darinadenali.com/uploads/1/3/0/7/130775056/xabom.pdf
    • http://proseandcommas.org/uploads/1/3/0/5/130543568/2884404.pdf
    • http://aikosilkart.net/uploads/1/3/0/4/130489539/e0b19341984af66.pdf
    • http://ufsunitedfacilityservices.com/uploads/1/3/0/4/130483680/xebar_pujanetan_nofup_dogowalubub.pdf
    • http://1s8ne0.salon225.com/uploads/1/3/0/4/130476483/130476483.html#elastic+deformation+stress+and+strain
    • http://naturetherapycic.com/uploads/1/3/0/2/130289571/tekijeketaxi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003b30.bin
b7cc616369dd8ac6fbe4a1d2bca94d70abb8e3f66892af1911e99f78cb2bc7f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x3B30 3588 bytes
font_01_sfnt_off000049aa.bin
4740d2183fa248e18ea8c35bdab88008491b349d411ded62f7a54afcbdd32960
pdf-font-stream PDF embedded font (sfnt) at offset 0x49AA 7784 bytes